Gate-valve.



T. WHITE.

GATE VALVE. APPLICATION man AuG.3o. 1909. RENEWED Nov. 5. 1912.

l 9 l 597453 Y Patented Nov. 9, 1915.

COLUMBIA PLANGGRAPH co., WASHINGTON. D, c.

d ATN 511 TILMAN WHITE, OF PORTLAND, OREGON, ASSIGNOR, BY DIRECT ANDMESNE ASSIGN- MENTS, TO DAVE HIRSTEL, 0F OAKLAND, CALIFORNIA.

GATE-VALVE.

Patented Nov. 9, 1915.

Application led August 30, 1909, Serial No. 515,330. .Renewed November5, 1912. Serial No. 729,656.

To all whom it may concern.' Y

Be it known that 1, TILMAN TWHITE, a citizen of the United States,residing in the city of Portland, in the county of Multnomah and Stateof Oregon, have invented a new and useful Gate-V alve, of which thefollowing is a clear and concise specification.

My invention relates to gate valves in which the valves are pressedagainst their seats after they come to rest in alinement with the valveseats, and in which the pressure against the seats is released beforethe valves are moved out of alinement with the seats.

The object of my invention is to provide a gate valve in which the valvedisk is moved laterally against the valve seat after the longitudinalmotion of the disk toward alinement with the seat has ceased.

Another object of the invention is to provide a gate valve in which thevalve disk is moved laterally away from the valve seat before thelongitudinal motion of the disk from alinement with the valve seatcommences.

A further object of the invention is to provide a gate valve in whichthe movable parts of the valve may be examined while the valve is underpressure.

A further object of the invention is to provide an eilcient gate valvewhich is easily operable under high pressure.

The invention possesses other advantageous features, which, with theforegoing, will be set forth at length in the following descriptionwhere I shall outline in full that form of the invention which I haveselected for illustration in the drawings accompanying and forming partof the present specification.

The novelty of the invention will be ineluded in the claims succeedingsaid description. j

From this it will be apparent that I do not limit myself to the showingmade by said drawings and description, since 1 may adopt many variationswithin the scope of my invention as expressed in said claims. Refer.-ring to said drawings: Y

Figure 1 is a section on the line 1, Fig. 4: of my device; Fig. 2 is anelevation of one of the valves in my device; Fig. 3 is a section on theline 3, Fig. 2; Fig. a is a section on the line 4, Fig. 1; Fig. 5 is anelevation of the adjusting wedge of my device; Fig. 6 is a sectionthrough the center of the ratchet of my device; Figs. 7 and 8 aredetails of one of the anti friction rolls of my device; Fig. 9 is asection on the line 9, Fig. 5 of my device and Fig. l() is a section ofthe ratchet adjusting lever taken at 90 degrees from the section takenin Fig. 6. y

Similar reference numerals refer to similar parts hereinafter set forthand illustrated in the accompanying drawings.

r1"he valves 1 and 2 as well as the wedge 3 between said valves 1 and 2are preferably provided with a common pivotal connection 4 whichswingingly mounts said vavles 1 and 2 and the wedge 3 in the housing 5which is preferably provided with the eX tensions 6 and 7 which may bethreaded or hanged for the purpose of connecting pipe to deliver anddischarge water through my device. lThe inner surface of the housing 5is preferably machined to form annular valve bearing seats 8 and 9 whichregister with the seats 10 and 11 of the valves 1 and The pivotalconnection L1 is advantageously extended into the depression 12 whichholds said pivotal connection in fixed relation to said housing 5 at oneend, the opposite end thereof being of the same diameter as the machinedhole 13 which is preferably provided with a plug 11 which when removedpermits the removal of the pivotal connection 4l and when in placeprevents leakage through the machined hole 13.

Thus it will be seen that the pin fl is held from longitudinal movementby said plug 14e. 1 do not wish to be limited to this constructionhowever as it may be desired to form said plug 14 and said pin 4lintegrally, thus affording a greater bearing in said housing for saidpin.

The housing 5 is preferably cast in one piece and is provided with ahollow center permitting the valves 1 and 2 as well as the adjustingwedge 3 to swing suiiiciently to entirely close the pipe opening 15 andwhen said valves 1 and 2 and the adjusting wedge 3 are raised saidhousing is of sufficient proportions to permit a free flow of waterthrough said opening 15.

Each of the valves 1 and 2 are provided with a segmental rack 16 whichengages aA pinion or gears 17 which is rotatably mounted in said housing5 by means of the arbor 18 journaled in the recess 19 at one end and inthe packing gland 2() at its opposite end which is preferably adapted toforce packing in the packing space 21 against the end of said gland 20Vas well as the arbor 18 and also against the end surface of the pinion17 preventing leakage 'from the inte 'ior oi the housing to theatmosphere. T he arbor 18 is extended through the paclring gland 20 andflattened on the end 22 to receive the handle which is swinginglysecured thereto by the pin This construction however, may be modilied asshown in Figs. G and 10 by providing a ratchet 25in the place ot theliattened end of said Varbor 13. The handle 2G vbeing swingingly mountedon said arbor 1S is provided. with a hollow center 27 which is adaptedto receive the spring 23 acting against the collar 29 which is securedto the pawl 30` which is slidably mounted in said hollow center 27 andis secured to the handle 31. Said pawl 30 is provided with an endinclined surface 32 engaging the teeth of said ratchet 25 to lift saidpawl out'oii engagement. rhe teeth are preferably providedl withsurfaces radiallyl disposed affording a means for engaging the straightsurface 3lof the pawl 30 thus when said pawl is turned 180 degrees byturning the handle 31 the direction of travel of said arbor 18 may bereversed.

By this construction it will be seen that the valves 1 and 2 and theadjusting wedge 3 may be raised and lowered. The adjustingwedge 3 ispreferably provided with an extension 35 which forms a portion of thesegmental rack 36 which as well as the segmental racks 16 engage andmesh with the teeth of the pinion or gear 17. llVhen the valves 1 and 2are lowered to the closed position the racks 1G disengage the pinion 17,however the rack 35 still engages said pinion 17 which forces the wedge3 downwardly spreading said valves 1 and 2 and crowding said valvesagainst their respective seats. The wedge 3 is provided with a pin 37which engages slots 38 provided in each of said valves 1 and 2, thuswhen said wedge 3 is raised said pin will engage the upper end ot saidslots 38 raising each of said valves 1 and 2 until said racks 16 engageand mesh with the pinion 17; said wedge 3 and each of said valves 1 and2 will continue rising until the raclr 36 of said wedge-3 ceases to meshwith said pinion 17 permitting the valves 1 and 2 to travel to theirupper position. The wedge is stoppedfin its upward path oi travel beforethe valves 1 and2 have reached their extreme travel to overcome thenecessity of providing additional space in the portion 39 of saidhousing 5.

I have provided antifriction rolls 40 which are held and travel in therecesses 41 provided in said wedge 3 and engage they vertical extendingbars 42 on the back ot each of said valves 1 and 2. Y

I have provided a cap 13"adjacent s racks 16 and 36 while the valves 1and 2 and the wedge 3 are in their lowered position said cap 13 beingremovably secured to the housing 5 for permitting inspection of saidvalves 1 and 2 and wedge 3, as well as the pinion 17 and said seats 8and 9, when my valve is under pressure. Said cap 13 also permits theremoval of said valves 1 and 2V and wedge 3.

I do not wish tobe limited to the specilic details herein set forth andillustrated in theV accompanying drawings but wish to depart therefromwithin the scope of the appended claims.

Having thus described my invention what I claim as new and desire to`secure by Letters Patent is:

1. In. a gate valve, a housing, valve seats providedk in said housingand valves pivotally connected to Vsaid housing andresting against saidvalve seats when the gate valve is closed, an adjusting wedge adapted tourge said valves against their respective seats and a` rack and gearwhereby the-valves a and adjusting wedge are operated'to open and closethe valve.

In a. gate valve, swingingly mounted Y valves are raised and lowered toopen andV close the gate valve and means whereby said segmental racksdisengage said gear when said valves are at their lower-termination oftravel. i

4. AIn a gate valve, a housing, a gear rotatably mounted within saidhousing', swingingly mounted valves having segmental racks engaging saidgear whereby said valves are raised and? lowered tol open and close thegate valve, means'whereby said segmental racks disengage said gear whensaid valves are at their lower termination of travel and an adjustingwedge lpivotally connected to said housing, a rack provided on saidladjusting wedge and means whereby said rack is kept in engagement withsaid gear when at the lower termination of travel to. urge said valvesagainst their respective seats.

5. In a gate valve, a housing, a gear rotatably mounted within saidhousing, swingingly mounted valves: havingV segmental racks engagingsaid gear whereby said valves are raised and lowered to open and closethe gate valve, means whereby said segmental racks disengage said gearwhen said valves are at their lower termination of travel, an adjustingwedge pivotally connectw ed to said housing, a rack provided on saidadjusting wedge, means whereby said rack is lrept in engagement withsaid gear when at the lower termination of travel to urge said valvesagainst their respective seats and a pin provided on said wedge engagingslots in said valves to raise said valves to bring the rack thereon intoengagement with the teeth of said gear permittingthe raising of thevalves and adjusting wedge.

6. In a gate valve, a housing, a gear rotatably Vmounted within saidhousing, swingingly mounted valves having segmental racks engaging saidgear whereby said valves are raised and lowered to open and close thegate valve, means whereby said segmental racks disengage said gear whensaid valves are at their lower termination of travel, an adjusting wedgepivotally connected to said housing, a rack provided on said adjustingwedge, means whereby said rack is kept in engagement with said gear whenat the lower termination of travel to urge said valves against theirrespective seats, a pin provided on said wedge engaging slots in saidvalves to raise said valves to bring the rack thereon into engagementwith the teeth of said gear permitting the raising of the valves andadjusting wedge and a means whereby said rack on the adjusting wedge maydisengage said gear at its upper termination et travel.

7. In a gate valve, swingingly mounted valves, a wedge disposed betweensaid valves, segmental racks provided on said valves and on said wedge,a gear engaging said segmental racks and a handle adapted to re volvesaid gear in either direction to raise and lower said wedge and saidvalves.

8. In a gate valve, a housing, valve seats provided in said housing,valves within said housing adapted to be moved into alinement with saidseats, an adjusting wedge arranged between said valves, racks on saidvalves and wedge, and a gear adapted to engage said racks.

9. In a gate valve, a housing, a valve seat in said housing, a valvepivotally connected to said housing adapted to be'moved into alinementwith said seat, a wedge adapted to urge said valve against said seat,racks on said valve and wedge, and a gear adapted to engage said racks.

l0. In a gate valve, a housing, a valve seat provided in said housing, aswingingly mounted valve, and a swingingly mounted wedge arranged insaid housing, a gear rotatably mounted within said housing, and operablefrom the exterior thereof, and racks on said valve and wedge engagingsaid gear.

11. in a gate valve, a housing, valve seats provided in said housing,valves within said housing adapted to be moved into alinement with saidseats, a swingingly mounted adjusting wedge arranged between said valvesand connected thereto, a racli on said wedge and a gear engaging saidrack.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

TILMAN VVHTE.

S. ALLBIN.

Copies of this patent may be obtained for ve cents each, by addressingthe Commissioner of Patents, Washington, D. G.

